- Mothers of preschool-aged-children, Berkeley USA, 1928-68
- N = 28
- Non Response:
Interviews at age 30 and age 70
- Authors's label
- Happiness at age 30
- Our Classification
- T1 happiness (age ± 30) assessed by interviewer ratings of cheerfulness.
Index of two ratings by a psychologist and a psychiatric social worker, who interviewed the subject independently.
T2 happiness (age ± 70) assessed by an index of two independent ratings: one by the interviewer and the other by a clinical psychologist who read the interview protocol.